BBC Four HD

Programmes start at 7.00pm.

Michael Portillo hears about the life and work of former riverboat captain Samuel Clemens, better known as Mark Twain.

Classic prison sitcom. Fletcher gets a permanent job with the pigs on the prison farm and dreams up a novel way to relieve the boredom of prison life.

Classic political sitcom. Jim Hacker faces embarrassment when Sir Humphrey tells a bigwig friend in the arts that the government is planning to cut grants.

Celebrating the 50th anniversary of a great Scottish landmark, the Forth Road Bridge.

Obama warns the Syrian regime against considering using chemical weapons. Contains some violence and disturbing scenes.

In this very special episode of Inside Culture, Mary Beard meets former US Secretary of State, First Lady, senator and presidential candidate Hillary Rodham Clinton.

The final episode sees Warhol as a man obsessed with money and security. Contains scenes which some viewers may find upsetting.

Michael Portillo hears about the life and work of former riverboat captain Samuel Clemens, better known as Mark Twain.

Obama warns the Syrian regime against considering using chemical weapons. Contains some violence and disturbing scenes.

Celebrating the 50th anniversary of a great Scottish landmark, the Forth Road Bridge.

Programmes start at 7.00pm.

Programmes start at 7.00pm.

Monty Don visits the world's 80 best gardens. He visits South America, a continent twice the size of Europe with 50,000 endemic plants.

Richard Hammond investigates the role water plays in the weather. He tries to weigh a cloud, finds out how rain could crush a car and starts an avalanche.

Secret recordings expose corruption between cops and armed robbers. Contains some strong language.

As fans prepare for the arrival of series nine of the BBC's long-running crime drama Shetland, actor Alison O'Donnell takes an affectionate look back on the series.

A severed hand washes up on a Shetland beach, sparking a complex murder investigation. Contains some strong language.

Travelling across Shetland, Ben Fogle meets people whose lives are rooted to these islands' history and visits a tiny church with big ideas.

Monty Don visits the world's 80 best gardens. He visits South America, a continent twice the size of Europe with 50,000 endemic plants.

Richard Hammond investigates the role water plays in the weather. He tries to weigh a cloud, finds out how rain could crush a car and starts an avalanche.

Secret recordings expose corruption between cops and armed robbers. Contains some strong language.

Programmes start at 7.00pm.

Programmes start at 7.00pm.

Monty Don sees the world through 80 of its most inspiring gardens. He meets garden guerrillas in New York, and visits a Virginian garden that reflects the birth of the nation.

Two-part series profiling Princess Margaret. This account reveals how Princess Margaret combined the rebellious force of modernity and respect for tradition.

World War II drama. A small group of agents is sent on a vital mission to destroy a Nazi V-2 rocket base in Holland. Their aim is to prevent flying bombs from falling on London.

An examination of the life and career of one of cinema's most glamorous stars, Sophia Loren, with rarely seen archive material telling the story of her hugely successful career.

Epic story of the Spanish hero (Charlton Heston), following his involvement in royal plots, his tempestuous marriage, and the campaign he led against the Moorish invaders in Spain.

Monty Don sees the world through 80 of its most inspiring gardens. He meets garden guerrillas in New York, and visits a Virginian garden that reflects the birth of the nation.

Programmes start at 7.00pm.

Programmes start at 7.00pm.

Julia Carling presents the pop chart programme, first broadcast on 21 June 1996 and featuring Longpigs, Gabrielle, Let Loose, Crowded House, Maxi Priest, Black Grape and Fugees.

Gina G presents the pop chart programme, first broadcast on 28 June 1996 and featuring Everything but the Girl, The Divine Comedy, Shampoo, Black Grape, Fugees and The Sex Pistols.

Paul Burnett presents the pop chart show, first broadcast on 21 September 1978 and featuring Buzzcocks, Brotherhood of Man, Leo Sayer, Stephen Bishop, The Three Degrees and 10cc.

John Peel presents the pop chart show. Includes appearances from David Christie, Culture Club, Fat Larry's Band, Depeche Mode, Musical Youth, Survivor and Evelyn King.

A concert by well-known American folk singers Peter, Paul and Mary, recorded on location at the Southport Theatre. From 1983.

Second part of a concert given by well-known American folk trio Peter, Paul and Mary during a visit to the UK in 1983. Recorded on location at the Southport Theatre.

Legendary singer-songwriter Judy Collins performs songs from throughout her career, delving back into the early days in Greenwich Village and beyond.

1966 concert by American folk singer Judy Collins, featuring Turn Turn Turn, Hey Nelly Nelly and My Rambling Boy.

Recorded at Islington's Union Chapel, this concert brings together English folk legend Martin Carthy and some of his most important collaborators.